The following system is a special instance of the Jennrich and Sampson test problem presented in [1]}, [2]}.
\(f(x) = \begin{bmatrix}e^{x_1} + e^{x_2} - 3 \\[1mm]e^{2x_1} + e^{2x_2} - 6\end{bmatrix} = {\bf 0}\,.\) 
